Three 3d–4f heterometallic coordination polymers based on polydentate ligand and sulfate: Synthesis, crystal structure and photoluminescent properties

Abstract

Abstract Three heterometallic coordination polymers [Gd 2 Cu(Hbidc) 2 (SO 4 ) 2 (H 2 O) 7 ] n ( 1 ), [Eu 2 Cu(Hbidc) 2 (SO 4 ) 2 (H 2 O) 7 ] n ( 2 ), and [Dy 2 Cu(Hbidc) 2 (SO 4 ) 2 (H 2 O) 7 ] n ( 3 ) (H 3 bidc = 1 H -benzimidazole-5,6-dicarboxylic acid) have been synthesized under hydrothermal conditions. They are characterized by elemental analysis (EA), infrared (IR) spectroscopy, thermogravimetric analysis (TGA), single crystal X-ray diffraction, and power X-ray diffraction (XRD). The results reveal that all complexes present almost identical three-dimensional (3D) PtS topology framework structures. The photoluminescent properties of 2 and 3 are investigated.